The problem of mathematical packaging is urgent! ! Look at the supplement in detail - Training Enrollment Network

The problem of mathematical packaging is urgent! ! Look at the supplement in detail

Question 1: Total surface area of cuboid = 2 * (20 *12+20 *12+)+2 * (12 *10+65438).

Wrapping paper =40*50=2000 (I don't know what you mean by the first 8), and count the ones behind.

Question 2: There is no graph.

Question 3: Same as 1

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